A method for actuating a bicycle electronic gearshift, is disclosed, comprising the steps of: (a) receiving a signal (detected_heart_rate) indicative of the heart rate of a cyclist using the bicycle, (b) receiving a signal (detected_power) indicative of the power delivered by the cyclist, (c) calculating a performance index (detected_performance_index) as a function of the value of the signal (detected_power) indicative of the power and of the value of the signal (detected_heart_rate) indicative of the heart rate, (d) obtaining a reference value for the performance index (performance_index_setpoint), (e) comparing (354, 356) the calculated performance index (detected_performance_index) with the reference value of the performance index (performance_index_setpoint), (f) emitting (362, 366) a control signal (control_signal, increase_ratio, decrease_ratio) of a gearshift (10) as a function of the outcome of comparing step (e).
